4 POTENTIAL STEP DIFFERENTIAL AMPEROMETRY IN A SINGLE-PULSE SEQUENCE MODE

A new type of four potential step differential. amperometry in a single pulse sequence mode is proposed on the basis of four potential step differential normal voltammetry. The charging current tends to be eliminated, and the background current is set at zero after the differentiation and addition of the sampling currents on these four potential steps. The signal-to-noise ratio is enhanced by utilizing a series of pulses. In addition, since the potential returns to its initial point, it is advantageous for electrode cleaning and the study of solid electrode and adsorption systems. This provides an alternative approach for electrical current-type electrochemical sensors, electrochemical detection in liquid chromatography, and electrode kinetics studies.